It is WTP problem because they have URI extension in with http://java.sun.com/xml/ns/j2ee/ namespace

<extension point="org.eclipse.wst.xml.core.catalogContributions">
<catalogContribution id="default">
<uri name="http://java.sun.com/xml/ns/j2ee/web-facesconfig_1_2.xsd" uri="catalog/web-facesconfig_1_2.xsd" />
</catalogContribution>
</extension>

but it should be http://java.sun.com/xml/ns/javaee